JBonDSS

Hi guys

I want to change the oil in my diff as it is starting to single spin in the wet.
I have the oil, I know it needs 2.6ltrs, i have the tools.
but i got under it today & i cant find the Fill plug??

I assume that the bottom bolt is a drain plug.

Has any one got a service manual or done it b4

1989 f150 5.0ltr Auto 3.55 ratio diff

Ta

__________________
F150 1989 5.0ltr
VX SS M6 Black 207rwkw 13.6@103 - SOLD :(
VH trackcar 202ci 107rwkw sandown 1:39 morwell hill climb 39sec
VC s/wagon still chuggin (just)
MF 1155 540ci tractor

 

'92BigBronco

There's no drain plug on the rear diff. The only way to change the lube is to remove the cover with a catch pan under the differential. After you drain the lube, clean the cover and bolts up real well and use a silicone sealant on the bolt threads and the cover to ensure a leak free installation. They make gaskets for it as well.

If it is in fact a limited slip, be sure to add the friction modifier available at any Ford dealership for a few bucks. It's required for "Traction Lock," aka posi Ford rear ends. If it is a posi and you're only spinning one wheel, odds are that the clutch pack/friction discs are just worn out and need to be replaced.

__________________
1992 Ford Bronco
351W
E4OD- B&M Stage 2 shift kit
Full 3" stainless Bassani Exhaust
32" BFG's/stock suspension

"No replacement for displacement."

"Our lugnuts require more torque than most Honda's produce!"

89F150

Dang!!! I just had a look at mine (hadn't been under neath the truck in a while) and its starting to leak. Time for new gasket i think.

JBonDSS

89F150 after you have replaces the gasket - tell me how you put the new oil in the diff :)

I may swing by Know ford & ask them & check about the additive

__________________
F150 1989 5.0ltr
VX SS M6 Black 207rwkw 13.6@103 - SOLD :(
VH trackcar 202ci 107rwkw sandown 1:39 morwell hill climb 39sec
VC s/wagon still chuggin (just)
MF 1155 540ci tractor

89F150

Isn't there a filler plug at the top of the diff at the front. I'kk have to have a look but i think you stick a ratchet into it and undo it.

89F150

I'll get some pics for you to show what i mean.
You just fill it with a funnel till it starts pissing out .

89F150

Here we are

Attached Images

100_4352.jpg (28.0 KB, 67 views)

89F150

How did you go JBon? Did you get it done ok. Haven't done mine yet. Havn't gotten gasket yet and its also been to wet to do much outside. Hope the pic helped.

JBonDSS

should get on to it tomorrow - saturday

__________________
F150 1989 5.0ltr
VX SS M6 Black 207rwkw 13.6@103 - SOLD :(
VH trackcar 202ci 107rwkw sandown 1:39 morwell hill climb 39sec
VC s/wagon still chuggin (just)
MF 1155 540ci tractor

Unregistered

i need help what diff should i use most likely for a greta vigor onroad car
belt driven not sure bout diff and manual say nothing

can you help??